diff --git a/lib/em-dir-watcher/invokers/subprocess_invoker.rb b/lib/em-dir-watcher/invokers/subprocess_invoker.rb
index 24f0170..3bb97e6 100644
--- a/lib/em-dir-watcher/invokers/subprocess_invoker.rb
+++ b/lib/em-dir-watcher/invokers/subprocess_invoker.rb
@@ -45,6 +45,7 @@ def ready_to_use!
     end
 
     def kill
+        @connection.detach
         if @io
             Process.kill 9, @io.pid
             Process.waitpid @io.pid